What Connections Do You Need?

  • HDMI: Most common. Available on most monitors, laptops and desktops. HDMI to HDMI cable is standard.
  • DisplayPort: Higher bandwidth than HDMI, supports higher refresh rates. Common on desktops and gaming monitors.
  • USB-C / Thunderbolt: Modern laptops (MacBooks, many ultrabooks) output video via USB-C. Use a USB-C to HDMI or USB-C to DisplayPort cable or adapter.
  • USB-C hub or docking station: If your laptop has only one USB-C port, a hub adds multiple video outputs.

Setting Up on Windows

  1. 1

    Connect the second monitor and let Windows detect it

    Plug in the cable. Windows usually detects the second monitor automatically within a few seconds and extends the desktop. If not, right-click the desktop → Display Settings → Detect.

  2. 2

    Press Windows + P to set display mode

    Windows + P opens the Project panel: Duplicate (same on both), Extend (different desktop on each — most useful), Second screen only, PC screen only. Select Extend for a proper dual-monitor workspace.

  3. 3

    Arrange displays to match physical positions

    Display Settings → scroll up to see the display arrangement. Drag the monitor icons to match your physical setup (e.g. monitor 2 to the right of monitor 1). Getting this right means your mouse moves naturally between screens in the correct direction.

  4. 4

    Set resolution and refresh rate for each monitor

    In Display Settings, click each monitor and set its native resolution (usually the highest available) and refresh rate. Mismatched resolutions between monitors are fine — set each to its own native resolution for the sharpest image.

Setting Up on Mac

  1. 5

    Connect and open System Settings → Displays

    Connect the second monitor. Open System Settings → Displays. Both displays appear. Click Arrangement to see and drag the display icons to match their physical positions.

  2. 6

    Mirror or extend

    Mirror Displays checkbox mirrors the same content. Untick it to use Extend mode (independent desktops). Drag the white menu bar rectangle to whichever display you want as your primary screen.

Laptop lid closed with external monitorOn Windows: connect the monitor and a power adapter, close the lid — the laptop continues running using the external display. On Mac: connect power, monitor, and a keyboard/mouse, then close the lid. Mac switches to clamshell mode using the external display only.

Frequently Asked Questions

Yes — Windows and Mac handle mixed-resolution setups well. Set each monitor to its own native resolution in display settings. The only oddity is text and UI scaling — if one monitor is HiDPI (Retina) and the other is standard, scaling settings in Windows (System → Display → Scale) can be set independently per monitor. Set each to 100% or 125% as appropriate for comfortable viewing.
Check the cable is fully seated at both ends. Confirm the monitor is powered on and set to the correct input source. On Windows: Display Settings → Detect. Try a different cable or port. If using an adapter (USB-C to HDMI), try a different adapter — cheap adapters are often unreliable. On a desktop, ensure you are connecting to the GPU ports (on the graphics card), not the motherboard ports.